/Engine/Source/Runtime/Engine/Classes/Materials/MaterialExpressionStrata.h
class UMaterialExpressionStrataThinFilm : public [UMaterialExpressionStrataUtilityBase](API\Runtime\Engine\Materials\UMaterialExpressionStrataUtility-)
FExpressionInpu...
F0
Defines the color and brightness of the specular highlight where the surface is facing the camera.
FExpressionInpu...
F90
Defines the color of the specular highlight where the surface normal is 90 degrees from the view direction.
FExpressionInpu...
IOR
Thin film IOR
FExpressionInpu...
Normal
The normal of the surface to consider.
FExpressionInpu...
Thickness
Thin film controls the thin film layer coating the current slab.